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installing different voltage panels

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  • installing different voltage panels

    I currently have two Siemens model SP130-24P panels hooked up in parallel. I would like to add two UniSolar US-64 panels in series to this system. Will this work?

    This is an off-grid application in Mexico.

    Thanks for any help you can provide.

  • #2
    Depending on the compatibility with the rest of your gear, you have two reasonable options:

    1) Put each of the UniSolar panels in series with each of Siemen's panels, giving you two strings at 49.5 Vmp and 3.9 Imp, giving 49.5 V and 7.8 A combined.
    2) Put the UniSolar panels in series with each other, created a 3rd string in parallel to your other two. Each of those strings would be 33 Vmp and 3.9-3.95 Imp, giving 33 V and 11.8 A combined.
    CS6P-260P/SE3000 - http://tiny.cc/ed5ozx

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